How long have Ricchan and Mio-chan known each other?

How long have Ricchan and Mio-chan known each other?

Yah!

It's been a long time, that's for sure.

It's been a long time, that's for sure.

... I'm sure you don't remember exactly how long.

U... Ummm...

What! You're treating me like Yui! Then, does Mio remember?

Of course!

Go out with me... Mio

I'll never forget this day...

I'll never forget this day...

TSUMUGI FILTER ACTIVE

TSUMUGI FILTER ACTIVE

Ricchan, you shouldn't forget an important anniversary like that.

Anniversary?

How did it turn out like that?